Alert archive / Pennsylvania / River Flood Warnings in 2009

River Flood Warning 16, NWS Philadelphia/Mount Holly

October 24, 2009Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Oct 24, 2009, 9:25 PM EDT for Bucks County, Pennsylvania. It took effect at Oct 25, 2009, 1:24 AM EDT. It was in force for 84 min.

The area

The counties it named.

The facts

Issued
Oct 24, 2009, 9:25 PM EDT (01:25 UTC)
In effect from
Oct 25, 2009, 1:24 AM EDT
Expired
Oct 25, 2009, 2:48 AM EDT
In force
84 min
Issued by
NWS Philadelphia/Mount Holly
Flood severity
Minor

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 01:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Neshaminy Creek near Langhorne (LNGP1). The gauge peaked at 8.98 ft at Oct 25, 2009, 1:00 AM EDT.

actionminormoderate051010/2510/26
Action stage
8 ft
Minor stage
9 ft
Moderate stage
12 ft
Major stage
14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01465500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS41 KPHI 250125
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
925 PM EDT SAT OCT 24 2009

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD 
WARNING FOR THE FOLLOWING RIVERS IN PENNSYLVANIA... 

  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC017-250725-
/O.NEW.KPHI.FL.W.0016.091025T0524Z-091025T1302Z/
/LNGP1.1.ER.091025T0524Z.091025T0600Z.091025T0702Z.NO/
925 PM EDT SAT OCT 24 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE NESHAMINY CREEK AT LANGHORNE.
* FROM LATE TONIGHT TO SUNDAY MORNING...OR UNTIL THE WARNING IS 
  CANCELLED.
* AT  8:45 PM SATURDAY THE STAGE WAS 5.0 FEET. 
* MINOR FLOODING IS FORECAST. 
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...RISE ABOVE FLOOD STAGE BY MIDNIGHT TONIGHT AND 
  CONTINUE TO RISE TO NEAR 9.5 FEET BY 2 AM. 
  THE RIVER WILL FALL BELOW FLOOD STAGE SUNDAY MORNING.
* IMPACT...AT 10.0 FEET...AT THIS LEVEL SOME HOMES IN THE AREA OF THE 
  LANGHORNE GAGE ARE EVACUATED

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0    5.03  SAT 9 PM     9.5  SUN 2 AM 

&&
1 follow-up statement
000 
WGUS81 KPHI 250648
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
248 AM EDT SUN OCT 25 2009

...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC017-250718-
/O.CAN.KPHI.FL.W.0016.000000T0000Z-091025T1302Z/
/LNGP1.1.ER.091025T0515Z.091025T0515Z.091025T0515Z.NO/
248 AM EDT SUN OCT 25 2009

* AT  2:15 AM SUNDAY THE STAGE WAS 8.8 FEET AND FALLING. 
* NO FLOODING IS CURRENTLY FORECAST.
* FLOOD STAGE IS 9.0 FEET. 
* IMPACT...AT 10.0 FEET...AT THIS LEVEL SOME HOMES IN THE AREA OF THE 
  LANGHORNE GAGE ARE EVACUATED

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0    8.79  SUN 2 AM     CRESTED AT 9 FT AND NOW FALLING.

&&

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 24, 8:01 PM EDTFlash Flood WarningPHIBucks, Philadelphia4 hr
Oct 24, 9:01 PM EDTAreal Flood WarningPHIMontgomery, Philadelphia9 hr
Oct 24, 9:26 PM EDTAreal Flood WarningPHIDelaware5 hr
Oct 24, 9:58 PM EDTAreal Flood WarningPHIMontgomery4 hr

Nearby

River Flood Warnings in Pennsylvania, 2009Every river flood warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.